% This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.

**Example**

```esql
ROW a=12.9
| EVAL atan=ATAN(a)
```

| a:double | atan:double |
| --- | --- |
| 12.9 | 1.4934316673669235 |